4391290 has 16 divisors (see below), whose sum is σ = 7957512. Its totient is φ = 1744704.

The previous prime is 4391263. The next prime is 4391323. The reversal of 4391290 is 921934.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3575881 + 815409 = 1891^2 + 903^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172 + ... + 2968.

Almost surely, 2^4391290 is an apocalyptic number.

4391290 is a deficient number, since it is larger than the sum of its proper divisors (3566222).

4391290 is a wasteful number, since it uses less digits than its factorization.

4391290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2961.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 4391290 is about 2095.5405030684. The cubic root of 4391290 is about 163.7560571153.

The spelling of 4391290 in words is "four million, three hundred ninety-one thousand, two hundred ninety".